3665761131 has 8 divisors (see below), whose sum is σ = 4893073984. Its totient is φ = 2441144520.

The previous prime is 3665761111. The next prime is 3665761157. The reversal of 3665761131 is 1311675663.

It is a happy number.

3665761131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3665761131 - 2⁷ = 3665761003 is a prime.

It is a super-2 number, since 2×3665761131² = 26875609339100798322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665761131.

It is not an unprimeable number, because it can be changed into a prime (3665761111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670885 + ... + 676326.

It is an arithmetic number, because the mean of its divisors is an integer number (611634248).

Almost surely, 2^3665761131 is an apocalyptic number.

3665761131 is a deficient number, since it is larger than the sum of its proper divisors (1227312853).

3665761131 is a wasteful number, since it uses less digits than its factorization.

3665761131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348121.

The product of its digits is 68040, while the sum is 39.

The square root of 3665761131 is about 60545.5294055639. The cubic root of 3665761131 is about 1541.8947178561.

The spelling of 3665761131 in words is "three billion, six hundred sixty-five million, seven hundred sixty-one thousand, one hundred thirty-one".